CN103629223A - Fastening implement and a power connection structure using the same - Google Patents

Abstract

The present invention provides a fastening fixture and a power supply connection structure, the fastening fixture can ensure the accuracy of the tightening torque during fastening and fastening and can easily release the fastening and fixing, and the power supply connection structure can be used in the fastening and fixing fixture It is properly fastened and fixed during normal use, and can be easily unfastened and fixed in an emergency. A fastening fixture (1) has a fastening body part (11) and a handle part (12). The fastening part (11) has a female thread part (111) capable of screwing with a male thread at one end, and the The other end has an engaging part (112) capable of engaging with the fastening tool, and the handle part (12) is extended from the outer peripheral side of the fastening main body part (11) to the outer peripheral side. The outer diameter of the handle portion (12) is set larger than the outer diameter of the engaging portion (112).

Description

Fastening fixture and power connection structure using the fastening fixture

technical field

The present invention relates to a fastening fixture that can be fastened and fixed with a high-precision tightening torque and can be easily released, and a power connection structure using the fastening and fastening fixture.

Background technique

Conventionally, structures using various screws are widely known as structures for fixing two or more parts.

The fixing structure using the screw can be fastened and fixed reliably and easily, so it is used in various applications. The fixing structure using a screw can also be used, for example, for connection of a negative electrode side electrode of a battery in a vehicle and an electrical wiring.

Patent Document 1 discloses a structure in which a negative electrode side electrode of a storage battery and an electric connection are connected and fixed using bolts and nuts. A joint made of a conductive material is disposed on the negative side electrode of the storage battery, and the joint has a male thread portion formed with a thread on the outer peripheral side surface. In addition, the external thread portion is configured to be screwable with the fixing nut.

The electrical connection has a terminal portion at its front end, and the male thread portion is inserted through the through hole of the terminal portion, and the fixing nut is threadedly engaged with the male thread portion, so that the joint and the electrical connection can be fastened and fixed.

In addition, Patent Document 2 discloses a fixing structure in which a resin handle is provided on the head of a bolt. In this fixing structure, the operator can perform fastening and fixing of the bolts and release of the fastening and fixing without using tools by holding and rotating the handle.

prior art literature

patent documents

Patent Document 1: Japanese Unexamined Patent Publication No. 2011-40185

Patent Document 2: Japanese Patent Laid-Open No. 2004-227914

Contents of the invention

The problem to be solved by the invention

However, the fastening and fixing structures shown in Patent Document 1 and Patent Document 2 have the following problems.

In Patent Document 1, it is necessary to use a fastening tool in order to fasten the bolt and the nut and to release the fastening. For this reason, even when the connection is to be released in an emergency, it is necessary to prepare a fastening tool, and it takes time to release the fastening.

In addition, in Patent Document 2, by using a handle, fastening and fastening and fastening and fastening release can be performed by the operator's hand without using a fastening tool, but it is difficult to use a correct tool for fastening and fastening. Tightening torque for tightening. Therefore, the accuracy of the tightening torque is likely to decrease, and excessive or insufficient tightening torque is likely to occur.

The present invention is made in view of the above-mentioned background, and provides a fastening fixture and a power supply connection structure, which can ensure the accuracy of the tightening torque during fastening and fastening and can easily release the fastening and fastening. The power supply connection structure uses This fastening tool is properly fastened and fixed during normal use, and can be easily unfastened and fixed in an emergency or the like.

means to solve the problem

In a technical solution of the present invention, the fastening fixture has:

A fastening main body having a female thread portion capable of screwing with the male thread at one end, and an engaging portion capable of engaging with a fastening tool at the other end;

and a handle portion extending from the outer peripheral side of the fastening main body toward the outer peripheral side,

The outer diameter of the handle portion is set to be larger than the outer diameter of the engaging portion.

In another technical solution of the present invention, a power connection structure for connecting a battery in a vehicle with electrical wiring is provided, the power connection structure has:

The above-mentioned fastening and fixing devices;

A joint having a male thread portion capable of being screwed to the female thread portion of the fastening fixture, and disposed on the negative side electrode of the storage battery; and

a terminal portion having a through-hole into which the above-mentioned male screw portion can be inserted,

Inserting the above-mentioned male thread part of the above-mentioned joint into the above-mentioned through-hole of the above-mentioned terminal part, and screwing the above-mentioned fastening and fixing tool to the male thread part, so as to connect the above-mentioned negative electrode side electrode of the above-mentioned storage battery to the above-mentioned electrical connection fixed and electrically connected.

Invention effect

As described above, the fastening tool includes the engaging portion and the handle portion. In the engaging portion, the fastening tool can be engaged with the engaging portion and the fastening tool can be screwed to the male thread to perform fastening and fastening and release of the fastening. As described above, by using the fastening tool, it is possible to facilitate the management of the tightening torque of the above-mentioned fastening tool, and to make the accuracy of the tightening torque the same as conventional ones.

Moreover, the outer diameter of the said handle part is set larger than the outer diameter of the said engaging part. Therefore, by holding and rotating the handle portion with the operator's hand, it is possible to generate a rotational force necessary for releasing the fastening and fixing by the fastening and fixing tool. Thereby, the fastening and fixing by the above-mentioned fastening and fixing tool can be easily released without using a fastening tool.

In this way, according to the above-mentioned fastening and fixing tool, in the case of fastening and fixing, high-precision fastening and fixing can be performed by using the above-mentioned engaging part, and when the fastening and fixing are released, the fastening and fixing can be quickly and easily released by using the above-mentioned handle part. Tight and secure.

In addition, in the power supply connection structure described above, the negative electrode side electrode of the storage battery in the vehicle is electrically connected to the electric wiring of the vehicle using the fastening fixture described above. In a vehicle, it is desirable that the negative-side electrode and the electric connection are properly fastened during normal use, and that the fastening and fastening can be easily released in an emergency or when the vehicle is not used for a long period of time. Therefore, by using the above-mentioned fastening fixture, an ideal power supply connection structure satisfying the above-mentioned requirements can be realized.

As described above, the following power connection structure can be provided. According to the above-mentioned fastening and fixing tool, the accuracy of the tightening torque at the time of fastening and fixing can be ensured, the fastening and fixing can be easily released, and the fastening and fixing can be properly performed during normal use. It is easy to release fastening and fixing in case of emergency etc.

Description of drawings

FIG. 1 is an explanatory diagram showing a fastening tool in Embodiment 1. FIG.

FIG. 2 is a plan view showing a fastening tool in Embodiment 1 (a view corresponding to the view along the arrow A in FIG. 1 ).

3 is a cross-sectional view showing the fastening tool in Embodiment 1 (corresponding to the cross-sectional view taken along line B-B in FIG. 2 ).

FIG. 4 is an explanatory diagram showing a power supply connection structure in Embodiment 2. FIG.

FIG. 5 is a cross-sectional view showing a power supply connection structure in Embodiment 2. FIG.

6 is an explanatory diagram in Embodiment 2, FIG. 6( a ) is an explanatory diagram showing connecting wires, FIG. 6( b ) is an explanatory diagram showing a closing member, and FIG. 6( c ) is a diagram showing electrical wiring Illustrating.

FIG. 7 is an explanatory diagram showing a configuration of a power supply connection configuration in Embodiment 2. FIG.

FIG. 8 is an explanatory diagram of a power supply connection structure in a disconnected state in Embodiment 2. FIG.

Detailed ways

In addition, the handle portion has a trident shape composed of three convex portions extending so as to be perpendicular to the central axis of the fastening body portion, and the respective convex portions may be spaced apart from each other with the central axis as a center. Equal angle configuration. In this case, the above-mentioned handle part can be made into the shape which is easy to grasp, and the operability can be improved.

In addition, the said female thread part and the said engaging part may be formed integrally with one member. In this case, the tightening torque applied to the engaging portion by the fastening tool can be efficiently transmitted to the female thread portion. In addition, it is possible to reduce the number of parts constituting the above fastening fixture.

In addition, the handle part may have a display part on which characters or symbols are written. In this case, by writing the precautions required for use and the range of the tightening torque value on the display unit, the fastening and fixing tool can be used safely and correctly.

In addition, the fastening and fixing tool described above can also be used for connecting and fixing the negative electrode side electrode and the electric wiring of the battery in the vehicle. It is preferable that the battery in the vehicle can be easily disconnected from the vehicle side in case of an emergency or when it has not been used for a long period of time. By using the fastening fixture for the connection between the negative-side electrode and the electrical wiring, the electrical connection between the battery and the vehicle can be easily and quickly released.

In the above-mentioned power supply connection structure, the above-mentioned terminal part of the above-mentioned electric connection has a terminal body part and a closing member, and the terminal body part has a pair of legs connected to the above-mentioned electric connection and extending in the same direction. The front ends of the pair of legs are arranged so as to be connected to each other, the through hole is formed by a space surrounded by the terminal main body and the closing member, and the closing member may be detachable from the terminal main body. In this case, by releasing the connection between the terminal main body and the closing member in the state where the fastening fixture and the male thread part of the joint are loosened, the male thread part can be removed from the terminal main body. Pull out the opening on the front end side of the above-mentioned pair of legs. Accordingly, the connection between the negative electrode side electrode and the electric connection can be released more quickly and easily without completely detaching the fastening fixture from the male screw portion.

Example

(Example 1)

An embodiment related to the fastening tool will be described with reference to FIGS. 1 to 3 .

As shown in FIGS. 1 to 3 , the fastening fixture 1 is provided with a fastening body portion 11 and a handle portion 12. The fastening body portion 11 is provided with a female thread portion 111 capable of screwing with a male thread at one end, and at the other end. One end is provided with an engaging portion 112 engageable with a fastening tool, and the handle portion 12 is extended from the outer peripheral side of the fastening body portion 11 toward the outer peripheral side. The outer diameter of the handle portion 12 is set larger than the outer diameter of the engaging portion 112 .

Hereinafter, further details will be given.

As shown in FIGS. 1 to 3 , the fastening main body 11 of the fastening fixture 1 is formed of a substantially cylindrical member, and has a female thread portion 111 disposed at one end thereof, and an engaging joint disposed at the other end side. part 112 and the anti-rotation part 113 formed on the outer peripheral side.

As shown in FIG. 3 , the internal thread portion 111 arranged at one end of the fastening main body 11 is formed at the center of the end face of the one end side of the fastening main body 11 on the inner peripheral side of the lower hole formed along the axial direction. thread. The female thread portion 111 is configured to be screwable with a corresponding male thread.

As shown in FIGS. 1 to 3 , the engagement portion 112 disposed at the other end of the fastening main body 11 protrudes from the end face of the other end of the fastening main body 11 , and forms a hexagonal shape when viewed from the axial direction. shape. The engaging portion 112 is configured to be engageable with a tool such as a hexagonal wrench or a wrench.

As shown in FIG. 3 , the anti-rotation portion 113 is formed at a position on one end side in the fastening main body portion 11 . The outer shape of the anti-rotation portion 113 is substantially square when viewed from the axial direction of the fastening body portion 11 . By providing the anti-rotation part 113, the fastening main body part 11 and the handle part 12 can be prevented from rotating relatively, and both can be rotated integrally.

As shown in FIGS. 1 to 3 , a handle portion 12 is formed on the outer peripheral side surface of the fastening body portion 11 . The handle portion 12 is made of a resin material, and is injection-molded together with the fastening body portion 11 . In addition, the handle portion 12 has: a grip portion 121 formed outside the anti-rotation portion 113 in the fastening body portion 11 , a handle cylinder portion 126 formed below the grip portion 121 , and a display portion formed on the surface of the grip portion 121 13.

As shown in FIGS. 1 to 3 , the grip portion 121 has a trident shape formed by three convex portions 122 extending perpendicular to the central axis of the fastening body portion 11. Each convex portion 122 is aligned with the central axis Centered at equal angles apart from each other. As shown in FIG. 2 , the diameter R2 of the handle-side circumscribed circle circumscribing the outer shape of the grip portion 121 viewed from the axial direction is set to be larger than the engagement-side circumscribed circle circumscribed of the outer shape of the engaging portion 112 viewed from the axial direction. R1.

As shown in FIGS. 1 to 3 , the grip portion 121 has: an upper surface portion 123 formed on a plane perpendicular to the central axis at a position on the other end side; Intersect and droop to form. Moreover, between the upper surface part 123 and the side surface part 124, the curved surface part 125 which consists of the curved surface which connects both is formed.

The handle barrel 126 formed below the grip 121 is formed in a cylindrical shape, and the handle barrel 126 is formed to cover the outer peripheral side from the lower surface of the grip 121 to the vicinity of the other end of the fastening body 11 .

As shown in FIGS. 1 to 3 , the display unit 13 has two display units: an upper surface side display unit 131 disposed on the upper surface portion 123 and a curved surface side display unit 132 disposed on the curved surface portion 125 .

The upper surface side display portion 131 is formed on the upper surface portion 123 of the one convex portion 122 . On the upper surface side display part 131, arrow marks and characters for indicating the release direction are described. In this embodiment, it is assumed that it is applied to a power supply connection structure, and characters indicating that the power supply is turned off are described on the upper surface side display portion 131 .

As shown in FIGS. 1 to 3 , the curved surface side display portion 132 is formed on the curved surface portion 125 disposed at a position opposite to the convex portion 122 on which the upper surface side display portion 131 is formed. On the curved surface side display portion 132 , 5.8 N·m to 7.5 N·m are described as characters indicating the management value of the fastening torque when the fastening tool 1 is fastened and fixed.

Hereinafter, the effect of the fastening and fixing tool 1 of the present embodiment will be described.

As described above, the fastening tool 1 includes the engaging portion 112 and the handle portion 12 . In the engaging portion 112 , the fastening tool 1 can be engaged with the engaging portion 112 to screw the fastening tool 1 and the male thread, and fastening and release can be performed. In this manner, by using the fastening tool, it is possible to easily manage the tightening torque of the fastening tool 1 and to achieve the same accuracy of the tightening torque as in the past.

In addition, the outer diameter of the handle portion 12 is set larger than the outer diameter of the engaging portion 112 . Therefore, by holding and rotating the handle portion 12 with the operator's hand, it is possible to generate a rotational force necessary for releasing the fastening of the fastening tool 1 . Thus, the fastening by the fastening tool 1 can be easily released without using a fastening tool.

In this way, according to the fastening and fixing tool 1, fastening and fixing with high precision can be achieved by using the engaging portion 112 when fastening and fixing, and fastening and fastening can be quickly and easily released by using the handle portion 12 when releasing the fastening and fixing. fixed.

In addition, the handle portion 12 has a trident shape constituted by three convex portions 122 extending perpendicularly to the central axis of the fastening body portion 11, and the respective convex portions 122 are equally spaced from each other centering on the central axis. Angle configuration. Therefore, the handle portion 12 can be formed into a shape that is easy to hold, and the operability thereof can be improved.

In addition, the female thread portion 111 and the engaging portion 112 are integrally formed of one member. Therefore, the tightening torque applied to the engaging portion 112 by the fastening tool can be efficiently transmitted to the female thread portion 111 . In addition, the number of parts constituting the fastening fixture 1 can be reduced.

In addition, the handle part 12 has a display part 13 on which characters or symbols are written. Therefore, by writing the precautions related to use and the range of the tightening torque value on the display unit 13 , the fastening tool 1 can be used safely and correctly.

In this embodiment, the handle portion 12 of the fastening fixture 1 is fixed to the fastening main body 11 , but it may be configured to be movable in the axial direction of the fastening main body 11 . In this case, the handle part 12 can be retracted to the one end side of the fastening tool 1, and it can prevent that the handle part 12 is operated erroneously. In addition, the handle part 12 moved to the retracted position may be arranged so as to be rotatable with respect to the fastening main body part 11 .

As described above, according to the fastening tool 1 , it is possible to easily release the fastening while ensuring the accuracy of the tightening torque at the time of fastening.

(Example 2)

This embodiment shows an example of the power connection structure 100 using the fastening fixture 1 of the first embodiment.

As shown in FIG. 4 and FIG. 5 , the power connection structure 100 is used to connect the battery 3 and the electrical connection 2 in the vehicle.

The power supply connection structure 100 has the fastening fixture 1 of the first embodiment, the electric connection 2 connected to the vehicle side, and the joint 4 connected to the negative electrode of the battery 3 .

As shown in FIG. 5 , the electrical wiring 2 has a connection wire 21 connected to an electric circuit of the vehicle, and a terminal portion 22 arranged at one end of the connection wire 21 .

The connection wire 21 includes a conductive wire (not shown in the figure) and an insulating layer covering the periphery of the conductive wire and having electrical insulation.

As shown in FIG. 5 and (a) of FIG. 6 , the terminal portion 22 has a crimping portion 222 connected and fixed to the conductive wire of the connecting wire 21 , a terminal body portion 221 extending from the crimping portion 222 , and a terminal body portion 221 connected to the terminal body portion 221 . Closing member 225 .

The caulking portion 222 has a substantially cylindrical shape before caulking, and a conductive wire is inserted into the inner periphery thereof to crimp the crimping portion 222 , whereby the crimping portion 222 is crimped and electrically connected to the conductive wire.

As shown in FIG. 5 and FIG. 6( a ), the terminal body portion 221 extending from the crimping portion 222 has a pair of leg portions 223 extending to the side opposite to the side where the crimping portion 222 is disposed. On the front end side of the pair of leg parts 223, a connection convex part 228 protruding outward from each leg part 223 is formed. In addition, a substantially U-shaped concave portion 224 is formed between the pair of leg portions 223 .

As shown in FIG. 6( b ), the closing member 225 has a substantially rectangular parallelepiped shape, and a groove portion 229 having an arcuate cross-sectional shape is formed on one of the four side surfaces 230 arranged parallel to the longitudinal direction thereof. . Furthermore, on one side surface 230 arranged perpendicularly to the side surface on which the groove portion 229 is formed, a connecting recessed portion 231 having an outer shape corresponding to the shape of the tip of the pair of leg portions 223 is formed.

As shown in FIG. 6( c ), the terminal main body 221 and the parallel member 225 are detachably connected by fitting the front ends of the pair of leg parts 223 into the connection recessed part 231 . At this time, the through-hole 226 into which the male screw portion 417 of the joint 4 can be inserted is formed by utilizing the space surrounded by the terminal main body portion 221 and the closing member 225 .

The battery 3 mounted on the vehicle has two battery posts 31 configured as a positive-side electrode and a negative-side electrode on its upper surface. The battery pole 31 is in the shape of a truncated cone whose diameter decreases toward the tip side.

As shown in FIG. 5 and FIG. 7 , the connector 4 disposed on the battery pole 31 configured as a negative electrode side electrode includes a connector holding portion 41 fixed to the battery pole 31, a mounting portion 412 to which the connector holding portion 41 is attached, and electrical wiring. 2 joint connection part 413.

The joint holding portion 41 is formed in a substantially cylindrical shape by arranging a substantially rectangular plate material on the circumference along its longitudinal direction, and has an opening 411 opening on the circumference when viewed from the axial direction.

As shown in FIGS. 5 and 7 , a pair of end portions of the joint holding portion 41 disposed in the opening portion 411 are provided with a pair of mounting portions 412 extending radially outward and bolts respectively penetrating through the mounting portions 412 . The hole 416 is inserted.

The bolt 414 is inserted into the bolt insertion hole 416 , and the bolt 414 is screwed together with the nut 415 . Note that the bolt 414 and the nut 415 are screwed together at a position where the inner diameter of the joint holding portion 41 becomes larger than the outer diameter of the battery post 31 .

As shown in FIGS. 5 and 7 , the joint connection portion 413 is formed on a plane perpendicular to the axial direction of the joint holding portion 41 from the lower end portion of the joint holding portion 41 on the opposite side to the mounting portion 412 and aligned with the joint holding portion 41 . The opposite side of the mounting portion 412 is extended. At a substantially central position of the joint holding portion 41 , a male thread portion 417 is arranged upright in parallel with the axial direction of the joint connecting portion 413 .

Next, the assembly sequence of the power connection structure 100 of this embodiment will be described.

First, the tab 4 is assembled to the battery post 31 constituting the negative side electrode of the battery 3 .

The battery pole 31 is inserted through the inner side of the joint holding part 41, and the bolt 414 and the nut 415 are tightened. When the bolt 414 and the nut 415 are tightened, the space between the openings 411 becomes narrow, and the inner diameter of the joint holding portion 41 becomes narrow. Thereby, the joint holding part 41 can be fixed to the battery pole 31. As shown in FIG.

Next, connect the electrical connection 2 with the connector 4 .

As shown in FIG. 5 , the male screw portion 417 included in the joint 4 is inserted through the inside of the through hole 226 in the terminal portion 22 of the electrical connection 2 . Then, the fastening tool is engaged with the engaging portion 112 of the fastening fixture 1, and the female thread portion 111 of the fastening fixture 1 and the male thread portion 417 of the joint 4 are screwed together using the fastening tool. And fasten it. Thus, the electrical connection 2 is electrically connected to the battery post 31 constituting the negative electrode side electrode of the battery 3 .

In the power connection structure 100 , the negative side electrode of the battery 3 in the vehicle is electrically connected to the electric connection 2 of the vehicle using the fastening fixture 1 . In a vehicle, it is desired that the negative electrode side electrode and the electrical connection 2 be properly fastened and fixed during normal use, and that the fastening and fixing can be easily released in an emergency or when the vehicle has not been used for a long time. Therefore, by using the fastening fixture 1 , an ideal power supply connection structure 100 satisfying the above requirements can be realized.

In addition, as shown in FIG. 8 , in the power supply connection structure 100 of the present embodiment, when the connection between the electric connection 2 and the battery pole 31 constituting the negative electrode side electrode of the battery 3 is released, gripping and rotating fastening The handle portion 12 of the tool 1 is fixed, and the fixation of the terminal portion 22 is released. Then, when the electric wire 2 is pulled to the side opposite to the extending direction of the leg 223 , the closing member 225 disposed at the tip of the leg 223 is separated from the terminal 22 . In the terminal portion 22 separated from the closing member 225 , an opening is formed between the leg portions 223 , so that the male screw portion 417 can be pulled out therefrom.

In the power connection structure 100, the terminal portion 22 of the electrical connection 2 has a terminal main body portion 221 and a closing member 225. The terminal main body portion 221 has a pair of leg portions 223 connected to the electrical connection 2 and extending in the same direction. This closing member 225 is disposed in a manner that connects the front ends of a pair of leg portions 223, and the through-hole 226 is formed by the space surrounded by the terminal main body 221 and the closing member 225, and is configured so that the closing member 225 can be separated from the terminal. The main body part 221 is detachable. For this reason, in the state where the threaded connection between the fastening fixture 1 and the male threaded portion 417 of the joint 4 is loosened, the connection between the terminal body portion 221 and the closing member 225 is released, so that the male threaded portion 417 can be removed from the terminal body. The opening part 411 on the front end side of the pair of leg parts 223 of the part 221 is pulled out. Accordingly, the connection between the negative electrode side electrode and the electrical connection 2 can be released more quickly and easily without completely detaching the fastening fixture 1 from the male thread portion 417 .

As described above, according to the power connection structure 100 of the present embodiment, it can be properly fastened and fixed during normal use, and can be easily unfastened and fixed in an emergency or the like.

Explanation of reference signs

l Fastening fixtures

100 power connection structure

11 Fasten the main body

111 female thread part

112 Engagement part

12 handle part

121 control department

122 convex part

13 Display

2 electrical wiring

22 Terminal part

221 Terminal main body

223 Legs

225 Closed components

226 through hole

3 batteries

4 connectors

417 male thread part

Claims (9)

1. A fastening fixture, characterized in that it has: a fastening main body having, at one end, a female thread portion capable of screwing with the male thread, and at the other end, an engaging portion capable of engaging with a fastening tool; and a handle portion extending from the outer peripheral side of the fastening main body toward the outer peripheral side, The outer diameter of the handle portion is set to be larger than the outer diameter of the engaging portion. 2. The fastening and fixing device according to claim 1, characterized in that, The handle part has a trident-shaped grip part, and the grip part is composed of three convex parts extending perpendicularly to the central axis of the fastening body part, and each convex part is spaced apart from each other around the central axis. Open equal angles to configure. 3. The fastening and fixing device according to claim 1 or 2, characterized in that, The female screw part and the engaging part are formed integrally with one member. 4. The fastening and fixing device according to claim 1 or 2, characterized in that, The handle portion has a display portion on which characters or symbols are written. 5. The fastening and fixing device according to claim 3, characterized in that, The handle portion has a display portion on which characters or symbols are written. 6. A power connection structure, which connects the battery in the vehicle and the electrical wiring, the power connection structure is characterized in that it has: The fastening and fixing device described in claim 1 or 2; A joint having a male thread portion capable of being screwed to the female thread portion of the fastening fixture, and disposed on the negative side electrode of the storage battery; and a terminal portion having a through-hole into which the above-mentioned male screw portion can be inserted, Inserting the above-mentioned male thread part of the above-mentioned joint into the above-mentioned through-hole of the above-mentioned terminal part, and screwing the above-mentioned fastening and fixing tool to the male thread part, so as to connect the above-mentioned negative electrode side electrode of the above-mentioned storage battery to the above-mentioned electrical connection fixed and electrically connected. 7. A power connection structure, which connects the storage battery in the vehicle and the electrical wiring, the power connection structure is characterized in that it has: The fastening and fixing device described in claim 5; A joint having a male thread portion capable of being screwed to the female thread portion of the fastening fixture, and disposed on the negative side electrode of the storage battery; and a terminal portion having a through-hole into which the above-mentioned male screw portion can be inserted, Inserting the above-mentioned male thread part of the above-mentioned joint into the above-mentioned through-hole of the above-mentioned terminal part, and screwing the above-mentioned fastening and fixing tool to the male thread part, so as to connect the above-mentioned negative electrode side electrode of the above-mentioned storage battery to the above-mentioned electrical connection fixed and electrically connected. 8. The power connection structure according to claim 6, characterized in that, The above-mentioned terminal part of the above-mentioned electric connection has a terminal body part and a closing member. The terminal main part has a pair of legs connected to the above-mentioned electric connection and extending in the same direction. The front ends are arranged so as to be connected to each other, the through hole is formed by a space surrounded by the terminal main body and the closing member, and the closing member is detachable from the terminal main body. 9. The power connection structure according to claim 7, characterized in that, The above-mentioned terminal part of the above-mentioned electric connection has a terminal body part and a closing member. The terminal main part has a pair of legs connected to the above-mentioned electric connection and extending in the same direction. The front ends are arranged so as to be connected to each other, the through hole is formed by a space surrounded by the terminal main body and the closing member, and the closing member is detachable from the terminal main body.

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